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四、“跳楼”拍卖,超期服役为了说明宇宙空间站的工程量和资源投入规模,不妨先介绍一下世界发展空间站的情况。从1971年4月19日苏联成功发射了世界第一个空间站“礼炮—1”号到现在,美苏共把9个空间站(其中,美国仅有1个)送上了太空,目前还正在建造国际空间站。从总体结构上讲,它们可分为单模块和多模块组合式两大类。前者是指用运载火箭一次就能送入太空轨道运行的空间站,后者是指由多次运送到轨道上的空间站单元或组合件组装而成,即由多个舱段或模块在轨道上组装而成的空间站。单模块或称单一式空间站具有所用硬件少、技术简单和不需要宇航员出舱等优点,因而早期的空间站都采用这类构型,它包括苏联的“礼炮-1-7”号和
Fourth, “jumping ” auction, extended service In order to illustrate the amount of engineering space and resources of the space station, may wish to introduce the situation of the World Development Space Station. From April 19, 1971, the Soviet Union successfully launched the world’s first space station “Salyut—1” to the present, and the United States and the Soviet Union have sent nine space stations (of which only one in the United States) to space. The International Space Station is being built. In terms of overall structure, they can be divided into two categories: single module and multi-module combination. The former refers to a space station that can be transported into space orbit with a launch vehicle once. The latter refers to a space station unit or assembly that is transported to the track multiple times. It is assembled from multiple compartments or modules on the track. Space station made. The single-module or single-space station has the advantages of less hardware used, simple technology, and no need for astronauts to get out of the cabin. Therefore, early space stations used this type of configuration. It includes the Soviet “Salute-1-7” and